A quadcopter or a quadroter helicopter is a multirotor helicopter,lifted and propelled by four rotors.They use two pairs of pitched propellers;two clock-wise and two anti-clock-wise.They use independent speed variation.By changing speed of each rotor,a desired total thrust is achieved.They differ from conventional helicopter that use rotors.They are the solution to some of the persistent problems in vertical flights.Smaller ones are cheaper compared to conventional helicopters.Their smaller blades are useful as they require less kinetic energy and have lesser risk of damage and is safer for close interaction.Bigger blade size increase efficiency as it takes less energy to generate thrust.Thus,they are used as amateur model aircraft projects because they are easy to control.

Before buying a quadcopter,one should know about the type he wants to use and the budget he had in order to choose the right type.They are use for different purposes like;research,camera holder,natural calamities,etc.

They are classified into different types:
1)AERIAL CINEMATOGRAPHY-It can lift a camera with tall landing gear. S1000 is one such examples.
2)SPORT AND SOCIAL- It is very light and stiff for responsive control.QAV 400/500 is one popular example.
3)SPORT FPV-Mounting surfaces for electronics and action cameras.Flip sport/DJI F450 is a well-known example.
4)MINI DRONE-It is small in size compared to the others and is indestructible.Hubsan X4 is a popular example.
5)FPV QUADCOPTER-It is indestructible with space to mount electronic devices and action cameras.QAV250 is a popular example.

There are different types of quadcopters,use for different purpose.Some of the most popular ones from amazon are given below:
1)Grabby Flying Remote Control Helicopter-Hx708-It has a 2 channel radio control features.One should avoid unattended for long periods.
2)The Flyers Bay Nano Quadcopter- It has 360 degree axis gyro stabilizer and is 2.4 G frequency Rc transmitter.Its flying height is-35 metres.
3)Saffire Nano Explorers 2.4G 4CH 6 Axis RC Quadcopter-It has a frequency of 2.4 G Control Channel abd built in 6 axis gyroscope.It is made flexible and wind resistant.

Among these 3 quadcopters found in amazon,the second one;Flyers Bay Nano Quadcopter has the highest rating from the rest with 3.5 out of 5 and is better than the two.Thus,different quadcopters are use for different purposes like;research,camera holder,rescue operation ,disaster relief,etc.

Having a quadcopter is nowadays the trendiest. More and more people desire to catch invaluable moments in a stylish way by using a quadcopter drone. Nevertheless, there some considerations you have to take into account in order to buy an amazing drone but, before that, I should tell you that a quadcopter must have three qualities: portability, functionality, and an awesome design.

First of all, it hast to be small, remembering the portability feature. Nobody wants to carry a heavy and giant quadcopter. They are meant to be carried wherever you need it, especially if they are used a lot to take pictures.

The controllable range is another great feature. You must assure that your quadcopter is easy to handle. That will make sure you won’t break it in an unexpected maneuver. Besides that, this includes the distance your quadcopter can be manipulated. If it goes too far and you lose the controllable ratio, just imagine what could happen!
The duration of the battery is also important to select the perfect quadcopter. If you decide to look for quadcopters in the market, be sure of asking the autonomy time. So you’ll have a perfect device which will stretch out the fun!

A design is probably the most desired and evaluated feature. It’s obvious that everyone would like a quadcopter drone with amazing elements and draw, plus the shape of its components can make it very attractive. The design is the perfect for a quadcopter to show off.

Last but not least is the availability of spare parts. Sometimes our quadcopters crash or suffer some damage and some spare part replacements are necessary. Try to be sure that you can easily find pieces for your quadcopter. If this is not taken into account, buying a quadcopter can be an ephemeral joy.

Take into account these few features when buying your quadcopter and you will have a lot of fun for sure!

Beginners should look for quadcopters that are ready to fly. This simply means that upon purchase the quadcopter requires no additional setup. The less you have to assemble yourself the longer your quadcopter will last. More technologically advanced models will require some setup but these are better left for professional.

Understand to maintain stability. Balance is achieved due to the mechanical simplicity in the quadcopter. The small-sized quadcopter can comfortably remain stable in the air due to resultant thrust created by each of the propellers. If one of the propeller generates more thrust than the other, the gadget will show an asymmetrical angle.Quadcopter uses fixed-pitch propellers, the smartest way for it to bring adjustment in its thrust capabilities is by increasing or decreasing the speed levels.

Check on the batteries before flying. All quadcopters run on batteries. It is important to measure the battery against the size of your model. The battery life on most models is far from extravagant. On average batteries will last from ten to twelve minutes. So having the ability to quickly swap a spent battery with a fresh one is a must.

Understand the four channels. Quadcopters will always include four channels. These channels are what allow you to rotate, move left/right, up/down, and backward/forwards. You should make sure you have correctly understood the four channels as a beginner.

Choose the quandcopter whose operation is simple. Stabilization is necessary for ease of operation. Stabilization can come in the form of gyros, barometers, cameras, or flight computers. Self-stabilization makes for an easy introduction to quadcopters, and some models come with an option to switch to an advanced mode.It allows for more swift motion and raises the difficulty. The ability to switch to the advanced mode option will allow you to get comfortable with your quadcopter, so you are less likely to damage it.